I have used the pp/par combination for Perl before.  It is pretty straight forward to convert an existing perl script into a stand alone windows executable.  
 
Both the Activestate licence and the Perl Artistic licence allow for embedding a script and perl interpreter together and distributing the result.
 
The current perl script(s) used for the R package build package could easily be converted to a 'stand alone' windows executable and be distributed with Rtools for those who do not want to install Perl themselves.
 
The only drawback is that even a "Hello World" script will result in over a meg sized executable (due to the perl interpreter being included).
 

________________________________

From: r-help-bounces@stat.math.ethz.ch on behalf of Gabor Grothendieck
Sent: Fri 5/4/2007 11:55 AM
To: Doran, Harold
Cc: r-help@stat.math.ethz.ch; Duncan Murdoch
Subject: Re: [R] [SPAM] - Re: R package development in windows - BayesianFilter detected spam



Just googling I found this:

http://www.perlmonks.org/?node_id=186402

On 5/4/07, Doran, Harold <HDoran@air.org> wrote:
>
> > The best, of course, would be to get rid of Perl altogether.
>
> In Python, it is possible to make standalone executables. Is it possible
> to also do this in Perl, then one could eliminate a perl install. Or, is
> it possible to use Python to accomplish what perl is currently doing? I
> may be getting in over my head here since I really don't know what perl
> is doing under the hood.
>
> Harold
>

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